Update abiParser.ts to work with foundry / forge output

[joeandrews]

Forge / Foundry structures ABI's as below. This change makes the ABI parser compatible with the output from forge.

{
  "abi": [],
  "bytecode": {
    "object": "0x60566037600b82828239805160001a607314602a57634e487b7160e01b600052600060045260246000fd5b30600052607381538281f3fe73000000000000000000000000000000000000000030146080604052600080fdfea26469706673582212205bf70e5aa6eb164145ba1ab154b06c77bba3192b4507a03c711393334ab8aafb64736f6c634300080a0033",
    "sourceMap": "153:195:3:-:0;;;;;;;;;;;;;;;-1:-1:-1;;;153:195:3;;;;;;;;;;;;;;;;;",
    "linkReferences": {}
  },
  "deployed_bytecode": {
    "object": "0x73000000000000000000000000000000000000000030146080604052600080fdfea26469706673582212205bf70e5aa6eb164145ba1ab154b06c77bba3192b4507a03c711393334ab8aafb64736f6c634300080a0033",
    "sourceMap": "153:195:3:-:0;;;;;;;;",
    "linkReferences": {}
  }
}

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[krzkaczor]

@joeandrews thanks for this! Can you add a test for this? There should be already a plenty of similar tests there.

[alvrs]

Added tests to this change here: #624

[krzkaczor]

Thanks @joeandrews and @alvrs, merged as https://github.com/dethcrypto/TypeChain/pull/624/files